Apparatus for perforating tape for automatic telegraph instruments.



m. 7|o,44s. Patented Oct. 7, 1902.

J. GELL. APPARATUS FOR PERFORATING TAPE FOR AUTOMATIC TELEGRAPHINSTRUMENTS.

(Application filed Nov. 26, 1901.)

heats-Shut I.

' Patented Oct. 7, 1902.

J. GELL.

APPARATUS FOR PEBFORATING TAPE FOR AUTOMATICv TELEGRAPH INSTRUMENTS.

(Application filed Nov. 26, 1901.)

' 3 Sheets-Sheet 2.

(No Model.)

.wasnmowu n c Patented Oct. 7, I902.

No. 7l0,448.

Y J. GELL. APPARATUS FOR PERFORATING TAPE FOB'AUTOMATIC TELEGRAPHINSTRUMENTS.

(Application filed. Nov. 26, 1901.)

3 SheetsSheet 3.

(No Model.)

2 733 Ira 16266074 GELL man/p 4 J HN Z 7/ pg m: NORRIS PETERS ca.PHOTO-LUNG" \VASHING'IGN, u. c.

UNITED STATES PATENT OFFICE.

JOHN GELL, OF \VELLINGTON, NEW ZEALAND.

APPARATUS FOR PERFORATING TAPE FOR AUTOMATIC TELEGRAPH lNSTRUMENTS.

SPECIFICATION formingpart of Letters Patent No. 710,448, dated October7, 1902.

Application filed November 26, 1901. Serial No. 83,724. (No model.)

T0 on whom it may concern:

Be it known that I, JOHN GELL, a subject of the King of Great Britain,residing at Wellington, New Zealand, have invented certain new anduseful Improvements in Apparatus for Perforating Tape for AutomaticTelegraph Instruments and the Like, of which the following is aspecification.

The invention is for the purpose of perforating paper tape for the usualWheatstone automatic telegraphinstruments or for other purposes by meansoperated from a standard type-writer keyboard in place of the threepunches now in practical use.

The instrument to be described has been arranged to perforate tape forthe use of transmitters operating cable siphon recorders. By modifyingthe connections and arrangements of magnets the instrument can, however,be adapted to the usual land-line Wheatstone.

The action of the instrument is shown in the accompanying plans, wherethe letters and figures in the different views represent the same parts.

Figure 1 is a plan view in the nature of a diagram of the completeapparatus. Fig. 2 is a side view of the perforating devices and adjacentmechanism with parts in section. Fig. 3 is a view looking from the leftof Fig. 2, showing the tape-feed mechanism and adjacent parts. Fig. 4 isa View taken from the left of Fig. 3, showing the differential check forthe tape-feed action, together with a shiftkey, spacing-key, and circuitconnections, this view being also diagrammatic in character. Fig. 5 is aside view of the keyboard, showing the latter combs, parallelliftingbars, contact-springs. and also the tape-feedcontrolling lever.Fig. 6 is a detail of the parallellifting-bars and contact-springs. Fig.7 is a detail view, partly in section, of the punches and adjacentparts. Figs. 8 and 9 represent portions of the tape. Fig. 10 is adiagram of the punches. Fig. 11 is a plan view of the punches and theirinteracting blocks. Fig. 1:2isa diagrammatic view of a modified way ofoperating the tape-feed. Fig. 13 is a detailof tape-feed rollers. Figs.14. and 15 are detail views of the multiple switch.

As shown in Fig. 10, a group of tape-perforatingpunches are arranged inthree rows.

Those of the middle row (usually spaced onetenth of an inch apart fromcenter to center) are for the purpose of engaging with the ratchet-wheelin the perforating-machine and in the transmitter to feed the tape. Theupper and lower rows consist of punches for forming the marking-holesand control in the transmitter the character of the signal-current andthe interval between the signals.

I have numbered the punches l to 9, and they are operated byelectromagnets Nos. 1 to 9, Fig. 1, through armature-levers 18, Figs. 1and 2, which are pivotedto a suitable part of the framework.

Instead of using thirteen perforating-magnets. one for each punch, Iemploy only nine, and I am enabled to reduce the number of magnets inthe following way: In Fig. 7 the central feed-hole punch is shown tohave a shoulder piece or block 15' engaging with shoulder pieces orblocks 14 on each of the outer or marking punches, and the three punchesin line transversely of the tape act as guide-bars to these blocks. Thecenter punch also has a spring 16 pressing against its block, whichraises the three punches to their normal positions.

It will be seen that if one of the markingpunches is depressed it willalso carry down the companion center punch, so that a marking-hole and afeed or ratchet-wheel hole will be cut by the action of a single magnet,these holes being in line transversely of the tape.

The single feed-hole and spacing-punch 5,

Fig. 10, is operated by its own perforatingmagnet No. 5.

Fig. 10, which also represents the result if allt-he punches are presseddown simultaneously, is a key to the system, for it comprises a seriesof holes which cover all possible combinations necessary, and theselective mechanism is so arranged that any combination of the punchescan be simultaneously brought into operation by the depression of theproper let ter-key, and thus cut in one operation the holes whichrepresent the letter on the key so depressed and together with thefeed-holes and the spacing-hole.

The letters are formed by certain combinations of perforations. Forinstance, the letter A is produced by operating simultaneously thepunches 5 4 7, as shown in Fig. 8. The letter B is produced by operatingpunches 5 6 3 2 1.

All the punches of the group necessary to form a letter, together withthe feed-hole punches and the spacing-punch 5,are operatedsimultaneously upon the depression of the key at the keyboard whichbears the character to be punched. For this purpose I employcircuit-selectin g mechanism,which whenany key is operated selects andcauses to be energized the proper electromagnets to operatesimultaneously the predetermined combination of punches necessary toform the letter. This mechanism comprises selectingcombs 19, one foreach key-lever 20, carried by vertically-movable rods 21, guided in theframe at 22 and arranged to be raised by a slot-and-pin connection 23with the key-lever. The key-levers are fulcrumed at 24 and carry thekeys 25, which bear the characters. Springs 26 hold the key-levers withthe'combs normally in the position shown in Fig. 5; but when a key isdepressed the comb is elevated and its teeth or projections 27 willselect and raise certain of the conducting-bars 28, which are arrangedin a group transversely of and.

above the rear ends of the key-levers. Each of these bars is supportedby links 29, pivoted at its ends and pivoted also to the fixed frame ofthe machine, so that in raising or lowering the conducting or contactbars will maintain their horizontal position. When any combination orpredetermined series of said bars is raised by the teeth of the comb,they contact with springs arranged above them, which I have marked 1',2, 3', 4, 5, 6, 7, 3, and 9. These springs are electrically connected,respectively, with the electromagnets No. 1, No. 2, &c., which latterare electrically connected with a common return-wire 30, leading to thebattery g, the other pole of which connects electrically through wire 31with all the conducting-bars 28 through their links 29 and their commonpivot-support 32. hen, for example, letter-key Ais depressed at thekeyboard, the selecting-comb thereof will raise certain of theconducting-bars 28 to engage the contact-springs 5 4 7. The current frombattery 9 now passes over the following course: wire 31, pivot 32, links29, the particular bars 23 which have been lifted by the comb, andcontact-springs 5', 4', and 7. From contact-springs 5, 4', and 7 thecurrent flows, respectively, through the wires 5 4 and 7 to theelectromagnets Nos. 5, 4, and 7 and thence byreturn-wires 30 and 33 tothe battery g. The energizing of magnets Nos. 5, 4, and 7 causes thepunches 5, 4, and 7 to cut holes 5 4 7, Fig. 8 and chart 10, torepresent the letter A on the Wheatstone tape. \Vhen another key isdepressed, its comb, being provided with teeth or projectionsdifferingin position from the A key mentioned above, will select adifierent combination or set of conducting-bars, thus selectingadifferent combination of circuits and Thus not only is the letter formedon the Wheatstone tape, but the ratchet-space hole between the letters.

Space between w0rds.In order to produce perforations representing theextra spaces between words, the spacing-punch 5 is util-' ized and meansare provided whereby said punch may be operated independently of all rthe other punches. For this purpose a spacebar34 is arranged at thefront of the machine, being carried by levers 35, fulcrumed intermediateof their length and carrying selecting-combs at their rear ends, which,however, are each provided with but a single projection, this being inposition to operate the conducting-bar which closes the circuit from thebattery through the contact-spring 5, the course of the current beingthence through wire 5 electromagnet 5, and return-wire 30 to battery 9.

Tape-feeding mecham'sm.The mechanism for feeding the tape through theslot 17 is represented in Figs. 1, 2, and 3 and comprises feed-rollers36 37, arranged in line with said slot and suitably journaled in theframe of the machine. The lower roller is provided with pins spaced toengage in ratchet-Wheel feed-holes previously cut and with aratchetwheel 38, engaged byabar 39, having ratchetteeth fitting into theteeth of the wheel. The bar is pressed into engagement with theratchet-wheel by a spring 40, and it is oper-' ated by an armature-lever41, pivoted to the frame at 42 and arranged to be operated byelectromagnets 43 44.

The armature-lever is shown in its position of rest in Fig. 3, it havingbeen drawn to the right by the energized magnet 44. When a key isdepressed, the electromagnet 44 is demagnetized and the magnet 43 isenergized, thus drawing the armature-lever to the left and setting theratchet-bar in proper relation to the ratchet-wheel to feed the latterwhen the key is released and the magnet 44 is again energized.

It will be seen from Fig. 3 that the ratchetbar when moved or set to theleft under the action of the magnet 43 slips over the ratchet withoutturning it, the spring 40 allowing the ratchet-bar to raise and a detent45 holding the ratchet against movement.

When the ratchet-bar moves toward the right under the action of theelectromagnet 44, the ratchet-wheel is turned to feed the tape beneaththe punches. a

The electromagnets 43 and 44 are in circuit with a feed-control lever45, Figs. 1 and 5, pivoted at 46 to a suitable part of the frame andhaving its rear end provided with a projection 47, always in contactwith the parallel lift-bar belonging to the contact-spring 5, which bar,as before stated, is in the nature of a universal bar, it being operatedby the selecting-comb of each key and also by the comb of the space-bar.

The opposite end of the tape-feed-control lever operates between twospring-contacts 48 49, supported upon but insulated from the mainsupporting-frame of the machine. The contact-spring 48 connectselectrically through wire 50 with the setting-electromagnet 43. Theother contact 49 is connected electrically through wire 51 with thetapefeed electromagnet 44, the return to battery 1 from theseelectromagnets being through the common return-wire 30.

Normally, or when the machine is at rest, the tape-feed-control lever 45is in contact with the upper contact 49 and the current from the batterypasses through wire 31, parallel lifting-bar, tape-feed-control lever45, wire 51, tape-feed electromagnet, and thence by return-wire tobattery. NVhen a key is depressed, the tape-feed-control lever isoperated, breaking the circuit at contact 49 and making it at contact48, so that the current passes now through the setting-magnet 43 by wayof wire 50, and the armature-lever 41 is then attracted, thus advancingthe ratchet-bar and setting it in position to operate the feed-rollers,which takes place when the key is released, and the feed-electromagnet44 is energized consequent upon the closing of the circuit at contact49.

Briefly stated, the depression of a key causes magnet 43 to set thetape-feed mechanism ready to act, and the release of the key causes thesetting-magnet 43 to be demagnetized and at the same time the tape-feedmagnet 44 to be energized to effect the feed of the tape, and the feedmechanism then remains in the position shown in Fig. 3 until another keyis depressed.

Diyj erential check for tape-feed mechanism.-As before stated, thedistance between the perforationsflmeasured longitudinally of the tape,is one-tenth of aninch. Someletters are composed of two punchings andothers of three, four, and live punchings, and it follows from this thatthe feed of the tape must be a differential one and correspond to thenumber of punchings composing the letter. For instance, the letter A,with its associated space, occupies three ratchet-wheel perforationsformed by punches 5 4 7. The letter 7 is composed of five perforationsformed by punches 5, 6, 3, 2, and 1. From this it will be seen that theletters as indicated by the perforations are of different lengths, andit is essential, therefore, to introduce a differential feed-checkmechanism to enable the letters to be perforated on the tapecontiguously and in proper succession and to give continuous andequallyspaced intermediate feed-perforations for the engagement of theratchet-wheel of the transmitting instrument.

This differential check for the tape-feed mechanism comprises fourmagnets a b 0 (Z, supported in the framework, as shown in Fig. 4, saidmagnets having their ar matnres 52 pivoted to the framework at 53 andhaving their free ends pivotally connected with check rods or bars 54,which are guided in the framework, as at 55, Fig. 4. The inner ends ofthese check-rods lie normally adjacent to a guideway 56, into which thearm 57 of the tape-feed armature 41 extends. Normally the arm 57 lies atthe upper end of the guideway against an adjustable stop pin or screw58.

It will be seen from Fig. 4 that in the position indicated of thecheck-bars the arm 57 can have a full stroke from the top to the bottomof the guideway, and when this movement takes place the ratchet-bar willbe set to its fullest extent leftward, Fig. 3, so as to give the maximumfeed of five ratchet-wheel holes to the tape when the finger-key isreleased and the feed-magnet 44 actuates the armature 41. If, however,previous to the setting action of the tape-feed ratchet-oar and armatureany one of the check-bars 54 is thrust across the guideway 56, thesetting movement leftward of the ratchet-bar will be limited accordinglyand the feed of the tape will be correspondingly limited in amount. Themagnet a, Fig. 4, when energized will operate its check-bar to limit thefeeding action to one ratchet-wheel hole,'magnet b to two holes, magnetc to three holes, magnet d to four holes, and the adjustable screw 59 atthe bottom of the guideway limits the feed of the tape to five holes.

The position of the check-bars 54 relative to the stroke of the armature57 may be accurately adjusted by means of adjustingscrews 60, carried bythe framework 61, upon which screws the check-bars rest. The magnet a,which limits the amount of feed to one ratchet-hole, is controlled fromthe space-bar 34,which has a contact 61 thereunder to close a circuitfrom the battery through line 62 and contact 63, Figs. 1 and 4, saidcircuit being completed through line 64, a switch-lever a, (hereinafterparticularly referred to,) a contact a line 65, magnet a, andreturn-wire 66 to battery. When the space-bar is depressed, thereforethe first action which results is the energizing of the magnet a throughthe circuit just described. This thrusts the first or upper check-bar,Fig. 1, across the guideway and limits the setting movement of thetape-feed mechanism, so that it will feed only one ratchet-hole. Thespace-bar being further depressed causes the punch 5 to be actuated, asbefore described, and then upon the release of the space-bar the onestepfeeding action of the tape-feeding mechanism takes place as the armature41 is swinging back to the right, as shown in Fig. 3.

From an inspection of Fig. 1 it will be seen that in addition to thecontact-springs 1 to 9' for closing the punchmagnet circuits threeadditional contact-springs 10, 11, and

12 are shown, and these control, respectively, the energizing of thefeed-check magnets Z; c d. The circuits between these contactsprings andtheir respective magnets are closed when certain of the finger-keys areoperated. For instance, the letter A requires, together with itsspace-hole, three holes, as shown in Fig. 3, so that when the A key isdepressed it is necessary to close the circuit to the check-magnet 0through the contact-spring 11, and for this purpose the selecting-comb19 of'the A key is provided, in addition to the projections thereonnecessary to operate the punching-magnets, with an additional projectionadapted to lift one of the parallel bars 28 to close the circuit throughthe contact-spring 11, which circuit may be traced to the check-magnet cin Fig. 4:, as follows: From the battery g to the bar 28, contact-spring11, switch-lever 0, wire 67 through the magnet c and line 68, throughthe return-wire 66 to opposite pole of the battery. In similar mannerthe check-magnets b and cl are energized to thrust their check-bars intothe pathof the check-feed armature-arm 57 when certain of the keys aredepressed, the character-sign of which requires such a feed movement ofthe tape as will be produced by limiting the throw of the arm 57 by therespective check-bars of said magnets 17 and cl. In every case theadjustment of contact-sprin gs is such that the check feed-magnets areoperated slightly before the perforating feed-magnets.

Punch" zg figures andpzmctuationmarks In addition to making theperforations for the letters it is necessary also to punch groups ofperforations representing figures or punctuation-marks, the. \Vhile thiscan be accomplished by providing a large number of per-.

forating or punch -operating magnets and multiplying the otherelements-such as the parallel bars, keys, &c.-I have, in order toprevent complication and to avoid enlarging the machine beyondreasonable limits, provided means whereby the difierential-spacingmechanism may be controlled at will, so as to vary the spacing movementto eliminate the separate perforation made by the spacingpunch 5 betweenthe letters, so that by combining two letter characters and arrangingthem contiguous they will represent, collectively, a differentcharacter-such as the figure 1, figure 9, or the interrogation-pointshown in the same figure. For instance, the perforations representingthe letters A and O can be made to represent the figure 1, and theperforations representing the letters I and r can be made to represent anote of interrogation. Thisis done by arranging the two groups necessaryto form the composite character contiguous to each other by eliminatingthe space-perforations. To accomplish my object here, I make use of ashiftingkey 69, the lever of which is fulcrumed similarly to theletter-key levers, said shift-lever having its rear end connected bypins and slots 70 with switches a b c d, which are pivoted to butinsulated from a post 71, extending up from the base of the machine.This switch is of a multiple character, and, as before described, themembers of it, a b c (1, form parts of the circuits, respectively,between the space-bar 34, diiferential tape-feed contact-springs 10, 11,and 12, and the diiferential-feed check-magnet a Z) 0 cl. Normally themembers of the multiple switch rest horizontally, as shown in Fig. 4,and the circuits when established are then through the checkingmagnetsa, b, c, and (1, respectively, as previously described; but when theshift-key is depressed the free ends of the levers of the multipleswitch are moved upwardly at an inclination, so that the member a isthrown out of operation as a conductor, and each of the otherswitchmembers leaves its own contact b 0 (1 respectively, and makes contactwith the next one above, member b engag: ing contact a and so on. Forexample, the electrical circuit through magnet c is now completedinstead through magnet b, so that the arm 57 of the tape-feed armatureis arrested-one hole less than normally. It will be seen from the abovethat by depressing the shift-key and then the A key the letter A isperforated, but on lifting the finger from the A keyand from theshift-key the tape is only advanced two ratchet-holes instead of three,because the check-magnet b has, by the depression of the shift-key, beenbrought into operation instead of checkingmagnet 0. Now upon depressingthe O key, as usual, the perforations representing the letter O will becutcontiguous to those representing the letter A and without any spaceintervening, thus forming a composite character, which in the presentinstance is the figure 1.- Similarly the interrogationpoint can be cutby depressing the shift-key, and then depressing the I key, and finallythe Z key. An air-cheek is shown at 75, Fig. 3, to form a cushion forthe tape-feed lever.

Instead of actuating the feed-magnets by the movement of lever 45 thefeed may be operated as shownin Fig. 12. Normallyspring 73 instead ofmagnet 44 of the previously-described form holds the ratchet-feed leveragainst a back-stop. When a key is depressed, the current fiows throughthe checkfeed magnets, as described, and also through theperforating-magnets; but instead of the current passing direct from theperforatingmagnets to the zinc pole of the battery by wire 30 it firstof all passes through the tapefeed-setting magnet 48, which attracts itsarmature and causes the rack-bar to move across the teeth ofratchet-wheel. Then the finger is raised from the key andthe magnetismceases, the spring 7 3 draws back the rackbar and moves forward thetape.

I claim as my invention 1. In combination with a group of punches to cutmarking-holes and also a series of feedholes, and differential tape-feedmechanism IIO having means to engage the series of feedholes, saidmechanism comprising setting means and dilferential checking meanstherefor, arranged and operating independently of the punches,substantially as described.

2. In combination in a perforating-machine, finger-keys, a group ofpunches, tape-feed mechanism, a single setting-magnet for the said tape-feed mechanism and means for checking the setting action of the saidsettingmagnet, the operation of said setting-magnet and the checkingmeans being controlled from the keys, substantially as described.

3. In combination inaperforating-machine, a group of punches,finger-keys, tape-feed mechanism comprising an electromagnet controlledfrom the keys and electromagnetic checking means for efiecting adifferential feed of the tape also controlled from the keys,substantially as described.

4. In combination in aperforating-machine, a'group of punches,finger-keys, tape-feeding mechanism comprising a lever, a setting-magnetfor setting the said lever, checking-magnets, checking-bars controlledby the checking-magnets to limit the setting movements of the lever, andmeans for controlling the checking-magnets from the keys, substantiallyas described.

5. In combination, a group of punches including marking punches and aspacingpuuch, a keyboard, means controlled thereby for operating thepunches and means controlled from the keyboard for eliminating theaction of the spacing-punch, substantially as described.

6. In combination, a group of punches including marking punches and aspacingpunch, keys, means for selecting certain of the punches andoperating them simultaneously to cut the marking-holes and also thespacing-hole and a key with means for eliminating the action of thespacing-punch, substantially as described.

7. In combination, a group of punches including marking punches and aspacingpunch, a keyboard, means controlled thereby for operatingthepunches and means for eliminating the action of the spacing-punch,said meansincludingvariable spacing mechanism, substantially asdescribed.

8. In combination, a group of punches including markingpunches and aspacingpunch, a keyboard, means controlled thereby for operating thepunches and means for eliminating the action of the spacing-punch, saidmeans including variable spacing mechanism and a shift-key forcontrolling the same, substantially as described.

9. In combination in a perforating-machine, keys, a group of punchesincluding marking and spacing punches, differential tape-feed ingmechanism having a differential movement according to the particular keystruck and means for varying the feed of the differential tape-feedingmechanism whereby composite characters inay be formed by cutting aplurality of characters in succes ion and contiguous to each other,substantially as described.

10. In combination in a perforatingmachine, a group of punchesincludingmarking and spacing punches, tape-feeding mechanism having adifferential movement, keys with means whereby the differential movementof the tape-feeding mechanism is controlled according to the particularkey operated and to the extent of the group of perforations composingthe letter corresponding to said key and means whereby the difierentialspacing movement may be varied to eliminate the action of thespacing-punch,substantially as described.

11. In combination in a perforating-machine, a group of punchesincluding marking and spacing punches, tape-feeding mechanism having adifferential movement, keys with means whereby the difierential movementof the tape-feeding mechanism is controlled according to the particularkey operated and to the extent of the group of perforations composingthe letter corresponding to said key and means whereby the differentialspacing movement may be varied to eliminate the action of thespacing-punch, said means including a shift-key, substantially asdescribed.

12. In combination in a perforatiugmachine, a groupof punches, akeyboard, means for operating the punches, and selecting meanscontrolled from the keyboard, said selecting means comprising a seriesof parallel bars arranged horizontally with means for supporting thesame to allow movement thereof while maintaining their parallelism andcontacts arranged above the upper edges of the bars to be engaged bysaid upper edges in the vertical movement of the bars, substantially asdescribed.

13. In combination, in a perforatingmachine, a group of punches, akeyboard, means for operating the punches, selecting-combs operated fromthe keyboard, a series of parallel bars arranged horizontally with meansfor supporting the same to allow movement thereof while maintainingtheir parallelism and contacts to be engaged by the parallel bars, saidcontacts being opposite one of the longitudinal edges of the bars whilethe combs operate on the opposite longitudinal edge of the bars,substantially as described.

14. In combination, a group of punches, a keyboard, means for operatingthe punches, and selecting mechanism comprising toothed combs connectedwith the keys to move therewith and a series of bars, links at theopposite ends of said bars to maintain them in their proper relativeposition in rising and falling, substantially as described.

15. In combination, a series of punches, a keyboard, tape-feedingmechanism, electromagnetic checking mechanism for the tapefeedingmechanism, means for operating the punches, selecting means between thekeylevers and the said operating means comprising a series of barssupported to have parallel movement, selecting-combs connected with thekey-lever for moving said bars, a series of contacts to be engaged bythe bars for controlling the operating means of the punches and contactsalso arranged to be engaged by certain of the bars for controlling thechecking mechanism, substantially as described.

16. In combination with a group of punches including marking-punches anda spacingpunch, a keyboard, means for operating the punches, selectingmechanism between the keyboard and said operating mechanism comprising aseries of bars arranged to have parallel movement and selecting-combsconnected with the key-levers for operating the bars, connectionsbetween the bars and the operating means of the punches, one of saidbars being of universal character and connected with the spacing-punchfor operating the same, substantially as described.

17. In combination, a group of punches, difierential tape feeding meansincluding checking-magnets and means for varying the action of thedilferential tape-feeding mechanism comprising switch means for changingthe circuits of said checking-magnets to make them operate in adifferent order from normally, substantially as described.

18. In combination in a group of punches, difierential tape feedingmeans including checking-magnets and means for varying the action of thedifferential tape-feeding mechanism comprising multiple-switch means forchanging the circuits of said checking-magnets to make them operate in adifferent order from normally, substantially as described.

19. In combination, a group of punches,

' means for operating them, tape-feeding mechanism comprising a settingand an actuating magnet, a keyboard, selecting mechanism controlledthereby and comprising a series of bars with means for supporting thesame to have parallel movement and a feed-controlling leveroperated byone of the bars and contacts arranged to be made and broken by theoperation of the feed-controlling lever for energizing either one or theother of the said magnets, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY E. COOPER, O. S. MIDDLETON.

